Arnold Moody accepted Brooklyn Supreme Court Justice Danny Chun's offer of a year in jail in exchange for plea. Sentencing was set for March 7. (Getty Images/iStockphoto)

A 72-year-old Brooklyn man charged with hate crimes for menacing a straphanger with a dagger during a homophobic rant last summer pleaded guilty Wednesday to weapons charges.

Arnold Moody accepted Brooklyn Supreme Court Justice Danny Chun's offer of a year in jail in exchange for plea. Sentencing was set for March 7.

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Chun told Moody he'd be credited with the six months he's already spent behind bars in a Rikers jail since his Aug. 9 arrest.

"Thank you, your honor," Moody said as he walked out of the courtroom.

According to a criminal complaint, Moody was aboard an A train when he angrily confronted another passenger, whipped out a knife and demanded to know why he was "standing like that," and repeatedly calling him a homophobic slur.

When the frightened victim exited at Nostrand Ave., Moody followed him, still brandishing the dagger — and was nabbed by plainclothes cops who were on the subway platform, authorities said.

Moody had been facing up to 7 years behind bars on a top charge of third-degree weapon possession.